Answer:
e. All of the above are correct.
Explanation:
Active transport is a type of transport in living systems in which molecules/ions/substances are moved or transported against their concentration gradient i.e. from a region where the substance is LOW to a region which it is HIGH, across a membrane. Since molecules are transported across a memembrane against their concentration gradient, an energy input in form of ATP is needed to do so.
Active transport is used in living systems to transport out secretory products and waste material against concentration gradients, take up nutrients from the environment against concentrations gradients etc. Since ions are substance moved by active transport from a low region to high region, there is an imbalance in the intracellular concentration of ions, such as Na, K etc.
Since there is no equilibrium in the concentration of ions on opposite sides of the membrane, an electric potential is formed across the membrane i.e. one part of the membrane will be more positively charged than the other.
Nucleus: to control the function of the cell.
<span>Mitochondria:The powerhouse of the cell .They take in nutrients, and breaks them down and creates energy for the cell.
</span><span>Chloroplast: to convert energy from the sun into sugars for the cell.
</span><span>Lysosomes:they digest waste or worn out organelles
</span><span>Vacuoles: the main function of vacuoles is to separate anything that can be harmful to the cell.
</span><span>Ribosomes: synthesize proteins for use through out the cell.
</span>ER: creates and folds proteins and then carries these synthesized substances to the Golgi apparatus.
<span>Golgi apparatus: identifying, processing and packaging macromolecules.
</span><span>
</span><span>Cell membrane: to protect the cell from its environment by controlling the movement of substances in and out of cells.
</span><span>Nuclear membrane: to separate the nucleus of a cell from the cytoplasm around it.
</span>Cell Wall: to protect the cell.
<span>Cytoplasm: to hold the cells organelles in place.</span>
Answer:
the first and second sentence
Explanation:
Answer:
B) Pure culture.
Explanation:
Obtaining a pure culture involves culturing the organism on the bacteriologic agar. Initially blood agar is used because it supports the growth of many bacteria and the type of hemolysis can be observed.
In order to obtain pure cultures, following steps are done :
1)The bacteria are normally streak onto solid media.
2) Inoculating loops are used for streaking.
3) Then the plate is incubated at desired temprature.
4) Then after sometimes , colonies are visible wherever <u>a microbial cell capable of growth on particular medium was deposited on the agar surface.</u>
As in the above scenario , a bit of isolated colony is taken and is inoculated in a separate medium thus a pure culture is formed.
Hence option B) Pure culture is the right answer.
Answer: The correct option for the fill in the blank is B) Transcript, ribosome.
mRNA is formed by a template of DNA in the nucleus of eukaryotic cells. The genetic information from DNA is transferred to mRNA in process called Transcription. mRNA is transported outside nucleus and helps in protein synthesis at the site called ribosomes.
mRNA thus carries a transcript of DNA instruction out of the nucleus. It helps in the formation of synthesis at ribososme ( present in the cytoplasm of the cell).
Thus, option B) is the right answer.
